diff --git a/test/test_extension.py b/test/test_extension.py
index 3ae317a..6e8ca87 100644
--- a/test/test_extension.py
+++ b/test/test_extension.py
@@ -7,5 +7,11 @@ def test_extension():
     assert MY_SECRET_SITE
     assert SocialSiteId.MY_SECRET_SITE
 
-    REGEXES.append(('test', MY_SECRET_SITE))
+    REGEXES.append((r'test(\d+)', MY_SECRET_SITE))
+
+    url = 'test123'
+    result = determine_social_from_url(url)
+    assert result is not None
+    assert result.social_site_id == MY_SECRET_SITE
+    assert result.social_id == '123'